<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<table border="1">
    <caption>12312</caption>
    <tr align="center">
        <th>name</th>
        <th>age</th>
        <th>gend</th>
    </tr>
    <tr>
        <td>小明</td>
        <td>29</td>
        <td>男</td>
    </tr>
</table>
<table border="1">

    <tr>
        <colgroup>123</colgroup>
        <th>name</th>
        <td>小明</td>
    </tr>
    <tr>
        <th>age</th>
        <td>26</td>
    </tr>
    <tr>
        <th>gend</th>
        <td>男</td>
    </tr>
</table>
</body>
</html>